style: Record DocumentState dependencies.

1 files changed, 10 insertions, 1 deletions

diff --git a/components/style/gecko/selector_parser.rs b/components/style/gecko/selector_parser.rs
index cb2c9d80050..0fe124beafa 100644
--- a/components/style/gecko/selector_parser.rs
+++ b/components/style/gecko/selector_parser.rs
@@ -5,7 +5,7 @@
 //! Gecko-specific bits for selector-parsing.
 
 use cssparser::{BasicParseError, BasicParseErrorKind, Parser, ToCss, Token, CowRcStr, SourceLocation};
-use element_state::ElementState;
+use element_state::{self, DocumentState, ElementState};
 use gecko_bindings::structs::CSSPseudoClassType;
 use gecko_bindings::structs::RawServoSelectorList;
 use gecko_bindings::sugar::ownership::{HasBoxFFI, HasFFI, HasSimpleFFI};
@@ -195,6 +195,15 @@ impl NonTSPseudoClass {
         apply_non_ts_list!(pseudo_class_state)
     }
 
+    /// Get the document state flag associated with a pseudo-class, if any.
+    pub fn document_state_flag(&self) -> DocumentState {
+        match *self {
+            NonTSPseudoClass::MozLocaleDir(..) => element_state::NS_DOCUMENT_STATE_RTL_LOCALE,
+            NonTSPseudoClass::MozWindowInactive => element_state::NS_DOCUMENT_STATE_WINDOW_INACTIVE,
+            _ => DocumentState::empty(),
+        }
+    }
+
     /// Returns true if the given pseudoclass should trigger style sharing cache
     /// revalidation.
     pub fn needs_cache_revalidation(&self) -> bool {